3656675780 has 96 divisors (see below), whose sum is σ = 8230118400. Its totient is φ = 1360755072.

The previous prime is 3656675779. The next prime is 3656675783. The reversal of 3656675780 is 875766563.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3656675783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5651417 + ... + 5652063.

It is an arithmetic number, because the mean of its divisors is an integer number (85730400).

Almost surely, 2^3656675780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3656675780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4115059200).

3656675780 is an abundant number, since it is smaller than the sum of its proper divisors (4573442620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3656675780 is a wasteful number, since it uses less digits than its factorization.

3656675780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The square root of 3656675780 is about 60470.4537770306. The cubic root of 3656675780 is about 1540.6198353821.

The spelling of 3656675780 in words is "three billion, six hundred fifty-six million, six hundred seventy-five thousand, seven hundred eighty".